CN212447766U - Screw nut and steering pull rod integrated electric steering device - Google Patents
Screw nut and steering pull rod integrated electric steering device Download PDFInfo
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- CN212447766U CN212447766U CN202020464324.1U CN202020464324U CN212447766U CN 212447766 U CN212447766 U CN 212447766U CN 202020464324 U CN202020464324 U CN 202020464324U CN 212447766 U CN212447766 U CN 212447766U
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Abstract
A screw nut and steering pull rod integrated electric steering device comprises a driving motor, a planetary roller screw, a hinge and a steering drag rod. A speed reducer is arranged inside the driving motor. And an output shaft of the driving motor is connected with the planetary roller screw. The planet roller screw rod is connected with the steering drag link through a hinge. The utility model has high working efficiency, little noise pollution and no air leakage and liquid leakage because of the elimination of the hydraulic system; particularly on various new energy vehicles, the power source of the vehicle does not depend on an engine and is easy to realize automatic control, so the vehicle has wider application range compared with the traditional structure; by adopting the planetary roller mechanism with the self-repairing function, the complexity of the steering mechanism can be simplified, the overall dimension of the mechanism can be reduced, and the service life can be prolonged.
Description
Technical Field
The utility model belongs to the technical field of heavily block, concretely relates to screw-nut and steering linkage integral type electric steering device.
Background
The traditional heavy commercial vehicle generally adopts a circulating ball type hydraulic power steering gear, and an engine drives a hydraulic oil pump to provide steering power for the vehicle; the new energy automobile cancels the engine, so the hydraulic oil pump is driven by the motor to provide power for the vehicle steering. Light commercial vehicles mostly adopt a vacuum boosting mode to provide power for steering because of small steering force. In any form, the vehicle is equipped with a hydraulic source that can continuously provide power for the system. During the running process of the vehicle, the steering gear works for a short time, so that the ineffective loss of energy is caused, and the noise of the hydraulic source during working can pollute the environment and cause the fatigue of drivers and passengers.
In order to solve the technical problem, the prior art uses an electric power steering device for a commercial vehicle, the mechanism adopts a circulating ball type structure, when the load of a front shaft of the vehicle is large, the radial size of the structure needs to be greatly increased in order to meet the stress requirement, so that the overall size of the whole steering gear is increased, and the problem that the steering gear cannot be arranged is caused under the condition of limited vehicle installation space, so that the appearance of the electric power steering device is limited by the space on the vehicle.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the above-mentioned prior art, the utility model aims at providing a screw-nut and steering linkage integral type electric steering device.
The utility model adopts the following technical proposal:
a screw nut and steering pull rod integrated electric steering device comprises a driving motor, a planetary roller screw, a hinge and a steering drag rod.
A speed reducer is arranged inside the driving motor.
And an output shaft of the driving motor is connected with the planetary roller screw.
The planet roller screw rod is connected with the steering drag link through a hinge.
Further, the planetary roller screw is a standard planetary roller screw. The standard planetary roller screw comprises a screw rod, rollers, a nut, a gear ring, a retainer and an elastic retainer ring.
And a plurality of rollers are arranged between the screw rod and the nut, and the screw rod is connected with the nut through the rollers.
And gear rings are respectively arranged at the two ends in the nut. And a retainer is arranged on the outer side of the gear ring. And outer gears are designed at two ends of the roller and are meshed with inner teeth on the gear ring. The rollers are connected through a gear ring. The roller is connected with the retainer through a hole on the retainer. An elastic retainer ring is designed on the outer side of the retainer; the circlip is installed in the circlip groove of the nut.
Further, the planetary roller screw is a non-standard planetary roller screw. The non-standard planetary roller screw comprises a screw rod, rollers, a nut, a retainer and a retainer ring. And two ends of the nut are respectively provided with a retainer ring, and the inner side of each retainer ring is provided with a retainer.
And a plurality of rollers are arranged between the screw rod and the nut, and the screw rod is connected with the nut through the rollers. The rollers are mounted in and separated by elongated circular slots in the cage.
Furthermore, the retainer ring is connected with the nut through threads or in interference fit.
Furthermore, the planetary roller screw adopts a grease lubrication mode, and the lubricating grease contains magnesium hydroxy silicate particles, wherein the particle size of the magnesium hydroxy silicate particles is less than 10 um.
Furthermore, the non-standard planetary roller screw adopts a grease lubrication mode, and the lubricating grease contains nano copper powder, nano graphite, nano calcium carbonate and nano PTFE.
Furthermore, the lead screw and the nut are triangular threads with a tooth form angle of ninety degrees, and the roller is provided with convex arc-shaped external threads.
The utility model has the advantages that:
1) because a hydraulic system is cancelled, the working efficiency is high, the noise pollution is low, and the phenomena of air leakage and liquid leakage do not exist.
2) Particularly, on various new energy vehicles, the power source of the vehicle does not depend on an engine, and automatic control is easy to realize, so that the vehicle has a wider application range compared with the traditional structure.
3) By adopting the planetary roller mechanism with the self-repairing function, the complexity of the steering mechanism can be simplified, the overall dimension of the mechanism can be reduced, and the service life can be prolonged.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment and a second embodiment;
FIG. 2 is a cross-sectional view of the planetary roller screw with markings;
FIG. 3 is a profile view of a planetary roller screw;
FIG. 4 is a cross-sectional view of a non-standard planetary roller screw;
fig. 5 is an outline view of a non-standard planetary ball screw holder.
Reference numerals: 1-driving motor, 2-planetary roller screw, 3-hinge, 4-steering drag link, 5-first retainer, 6-first gear ring, 7-roller, 8-nut, 9-first elastic retainer ring, 10-screw, 11-second gear ring, 12-second retainer, 13-second elastic retainer ring, 14-first retainer ring, 15-second retainer ring and 16-third retainer ring.
Detailed Description
For the convenience of understanding, the technical solution of the present invention is further described in detail below by way of embodiments with reference to the accompanying drawings:
the first embodiment is as follows:
as shown in fig. 1, 2 and 3:
a screw nut and steering pull rod integrated electric steering device comprises a driving motor 1, a planetary roller screw 2, a hinge 3 and a steering drag rod 4.
The speed reducer is arranged in the driving motor 1, so that the structure can be simplified, and the mechanism is more compact.
An output shaft of the driving motor 1 is connected with the planetary roller screw 2.
The planetary roller screw 2 is connected to a trailing arm 4 of the vehicle via a joint 3.
The planetary roller screw 2 is a standard planetary roller screw.
The planetary roller screw 2 comprises a screw 10, rollers 7, a nut 8, a first gear ring 6, a second gear ring 11, a first retainer 5, a second retainer 12, a first elastic retainer ring 9 and a second elastic retainer ring 13.
A plurality of rollers 7 are arranged between the screw rod 10 and the nut 8, and the screw rod 10 is connected with the nut 8 through the rollers 7.
And a first gear ring 6 and a second gear ring 11 are respectively arranged at two ends in the nut 8.
And outer gear structures are designed at two ends of the roller 7, and the roller 7 is meshed with inner teeth on the first gear ring 6 and the second gear ring 11.
The two ends of the roller 7 are inserted into the holes on the first retainer 5 and the second retainer 12, so that the rollers 7 are always in a separated state in the motion process, and mutual friction is avoided. A first elastic check ring 9 and a second elastic check ring 13 are designed on the outer sides of the first retainer 5 and the second retainer 12; the first elastic retainer ring 9 and the second elastic retainer ring 13 are arranged in a clamp spring groove of the nut 8, and the first retainer 5 and the second retainer 12 are prevented from being separated from the nut 8.
When one roller 7 starts to roll, the rotary motion of the roller is transmitted to the other rollers 7 through the first gear ring 6 and the second gear ring 11, and all the rollers 7 are ensured to rotate at the same speed, so that the friction coefficient between the screw rod 10 and the rollers 7 and between the rollers 7 and the nut 8 is reduced, and the transmission efficiency is improved.
The screw rod 10 and the nut 8 adopt triangular threads with the tooth form angle of ninety degrees, and the roller 7 adopts convex arc external threads. The roller 7, the screw rod 10 and the nut 8 are in point contact, so that external lubricating grease can easily enter, the roller is stored nearby the friction surface, the lubricating effect of the friction surface can be effectively improved, the friction coefficient is reduced, and the transmission efficiency of the mechanism is further improved.
The planetary roller screw 2 adopts a grease lubrication mode, and the lubricating grease contains magnesium hydroxy silicate particles, and the particle size of the magnesium hydroxy silicate particles is less than 10 um. Therefore, the mechanism has a self-repairing function, and the service life of the mechanism is prolonged.
The working principle is as follows: when the electric steering mechanism works, the driving motor 1 drives the screw rod 10 in the planetary roller screw 2 to rotate, the planetary roller screw 2 converts the rotary motion into the linear motion of the nut 8, and the nut 8 drives the steering drag link 4 through the hinge 3 to complete the steering action.
Example two:
as shown in fig. 1, 3, 4 and 5:
a screw nut and steering pull rod integrated electric steering device comprises a driving motor 1, a planetary roller screw 2, a hinge 3 and a steering drag rod 4.
The speed reducer is arranged in the driving motor 1, so that the structure can be simplified, and the mechanism is more compact.
An output shaft of the driving motor 1 is connected with the planetary roller screw 2.
The planetary roller screw 2 is connected to a trailing arm 4 of the vehicle via a joint 3.
The planetary roller screw 2 is a non-standard planetary roller screw.
The planetary roller screw 2 comprises a screw 10, rollers 7, a nut 8, a third retainer 16, a first retainer ring 14 and a second retainer ring 15.
A first retainer ring 14 and a second retainer ring 15 are respectively arranged at two ends in the nut 10, and a third retainer 16 is arranged on the inner sides of the two retainer rings.
A plurality of rollers 7 are arranged between the screw rod 10 and the nut 8, and the screw rod 10 is connected with the nut 8 through the rollers 7.
The rollers 7 are mounted in and separated by elongated circular grooves of the cage three 16.
The first retainer ring 14 and the second retainer ring 15 can be connected with the nut 8 through threads or interference fit.
The screw rod 10 and the nut 8 adopt triangular threads with the tooth form angle of ninety degrees, and convex arc-shaped external threads are adopted on the roller 7.
The planet roller screw 2 adopts a grease lubrication mode, and the lubricating grease contains nano additives such as nano copper powder, nano graphite, nano calcium carbonate, nano PTFE and the like. The mechanism has a self-repairing function and the service life is prolonged.
The working principle is as follows: when the electric steering mechanism works, the driving motor 1 drives the screw rod 10 in the planetary roller screw 2 to rotate, the planetary roller screw 2 converts the rotary motion into the linear motion of the nut 8, and the nut 8 drives the steering drag link 4 through the hinge 3 to complete the steering action.
The above embodiments are merely illustrative or explanatory of the technical solution of the present invention, and should not be construed as limiting the technical solution of the present invention, and it is obvious that those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. The present invention also includes such modifications and variations provided they come within the scope of the appended claims and their equivalents.
Claims (8)
1. The utility model provides a screw-nut and steering linkage integral type electric steering device, includes driving motor, planet roller lead screw, hinge and steering linkage, driving motor is inside to be provided with the reduction gear, driving motor's output shaft links to each other with planet roller lead screw, planet roller lead screw passes through the hinge and links to each other with steering linkage.
2. The feed screw nut and steering tie rod integrated electric power steering apparatus according to claim 1, characterized in that: the planet roller screw is a standard planet roller screw, the standard planet roller screw comprises a screw rod, rollers, a nut, a gear ring, a retainer and an elastic check ring, the gear ring is arranged at each of the two ends in the nut, the retainer is arranged on the outer side of the gear ring, outer gears are designed at the two ends of the rollers, the outer gears are meshed with inner teeth on the gear ring, the rollers are connected through the gear ring, holes in the rollers are connected with the retainer, the elastic check ring is designed on the outer side of the retainer, and the elastic check ring is fixed in a clamp spring groove of the nut.
3. The feed screw nut and steering tie rod integrated electric power steering apparatus according to claim 1, characterized in that: the planet roller screw is a non-standard planet roller screw, the non-standard planet roller screw comprises a screw rod, rollers, a nut, a retainer and retainer rings, the retainer rings are arranged at two ends in the nut respectively, the retainer rings are arranged on the inner sides of the retainer rings, and two ends of each roller are arranged in the long circular grooves on the corresponding retainer respectively and are separated by the retainer.
4. The feed screw nut and steering tie rod integrated electric power steering apparatus according to claim 3, characterized in that: the retainer ring is connected with the nut through threads or in interference fit.
5. The feed screw nut and steering tie rod integrated electric power steering apparatus according to claim 2 or 3, characterized in that: and a plurality of rollers are arranged between the screw rod and the nut, and the screw rod is connected with the nut through the rollers.
6. The feed screw nut and steering tie rod integrated electric power steering apparatus according to claim 2 or 3, characterized in that: by adopting a grease lubrication mode, the grease contains magnesium hydroxy silicate particles, and the particle size of the particles is less than 10 um.
7. The feed screw nut and steering tie rod integrated electric power steering apparatus according to claim 2 or 3, characterized in that: the grease lubrication mode is adopted, and the lubricating grease contains nano copper powder, nano graphite, nano calcium carbonate and nano PTFE.
8. The feed screw nut and steering tie rod integrated electric power steering apparatus according to claim 5, characterized in that: the lead screw and the nut adopt triangular threads with a tooth form angle of ninety degrees, and the roller adopts convex arc-shaped external threads.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202020464324.1U CN212447766U (en) | 2020-04-02 | 2020-04-02 | Screw nut and steering pull rod integrated electric steering device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202020464324.1U CN212447766U (en) | 2020-04-02 | 2020-04-02 | Screw nut and steering pull rod integrated electric steering device |
Publications (1)
Publication Number | Publication Date |
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CN212447766U true CN212447766U (en) | 2021-02-02 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN202020464324.1U Active CN212447766U (en) | 2020-04-02 | 2020-04-02 | Screw nut and steering pull rod integrated electric steering device |
Country Status (1)
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CN (1) | CN212447766U (en) |
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2020
- 2020-04-02 CN CN202020464324.1U patent/CN212447766U/en active Active
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